N.5 Flashcards
What is a cyst?
A cyst is a sac containing liquid or semisolid substance, usually with an inner lining of secreting membrane.
What is a congenital cyst?
A congenital cyst is present at birth and results from the failure of an embryonic cavity to close, such as polycystic kidney or Uterine Serosal Inclusion Cysts.
What is a retention cyst and how is it formed?
A retention cyst is formed by the retention of the secretions of a gland due to occlusion of a duct or the gland, such as a ranula or mucous cyst at the base of the epiglottis.
What characterizes an exudation cyst?
An exudation cyst is formed due to the accumulation of fluid in a preexisting cavity, often resulting from inflammation of mucous membranes and tendon-sheaths.
What is the origin of uterine serosal inclusion cysts?
Uterine serosal inclusion cysts are believed to arise from mesothelial cells trapped within serosal connective tissue.
What type of cysts are associated with polycystic kidney disease in cats?
Polycystic kidney disease is characterized by the presence of multiple cysts in the kidneys.
What is an atheroma and where is it commonly found?
An atheroma is a specific type of epidermoid cyst that commonly occurs in the false nostril.
What are dermoid cysts and where can they develop?
Dermoid cysts develop from misplaced embryonic germ-cells of the skin or mucous membranes and may pass into inner organs such as the subcutis, ovaries, testicles, and brain, containing elements like epidermis, hair, and various glands.
What are the characteristics of dentigerous cysts?
Dentigerous cysts are hard swellings that arise from tooth germ tissue, occurring in horses and cattle near the parotid glands, and may contain one or more teeth.
What are genuine cysts and where are they commonly found?
Genuine cysts are glandular, epithelial cysts commonly found in the ovaries and thyroid glands. They represent ordinary cystic formations that can be single or multiple.
What are degeneration cysts and where do they most often occur?
Degeneration cysts are cystic degenerated neoplasms that most often occur in sarcomata and carcinomata, such as cystosarcoma, cystocarcinoma, and cystofibroma.
What is an encapsulation cyst and what are some examples?
An encapsulation cyst is formed around foreign bodies and parasites, such as hydatid cysts and Sarcocystis cysts.
What are the characteristics of cysts in terms of development and appearance?
Cysts are non-inflammatory, slow in development, have a well-defined periphery, and a fluid-containing cyst will fluctuate uniformly.
How can a cyst be differentiated from inflammatory swellings, abscesses, and hematomas?
A cyst can be easily differentiated from inflammatory swellings, abscesses, and hematomas due to its non-inflammatory nature and well-defined structure.
Describe the radiographic appearance of a dentigerous cyst.
Radiographs show a characteristic radiolucent halo surrounding the non-erupted tooth, originating at the cementoenamel junction and enveloping the crown of the tooth.
